Beschreibung:
<jats:title>SUMMARY</jats:title><jats:p>Samples from six ash soils were chosen with a range of Fe and C contents. Stabilities over the aggregate size‐range from < 1 †m to > 2 mm were measured by selectively removing aggregating agents from fresh soil samples. Wet‐sieving was also carried out on both field‐moist and air‐dried 3.4–2.0 mm macroaggregates.</jats:p><jats:p>Macroaggregate stabilities were closely related to C contents and were also enhanced by high contents of allophane and/or Fe<jats:sub>ox</jats:sub>. High water contents decreased the stability of field‐moist macroaggregates.</jats:p><jats:p>Clay‐sized material was most readily dispersed with Na resin after pretreatment with hydrogen peroxide; removing the latter alone was usually ineffective in dispersing clays.</jats:p>